The same sources also said Lohan was a "nightmare" on set, would not come out of her trailer to do her scenes, threatened to leave early, and when she finally did finish her scenes, the crew applauded on her exit.

Lohan's rep had not heard of the allegations when reached by FOX411, and thus had no comment.

A rep for 'Anger Management' had been told of the TMZ report but was not able to comment as the show was not in production on Friday.